On Mon, Feb 08, 2021 at 06:44:52PM +0800, Yicong Yang wrote:

Hi Greg,

On 2021/2/5 17:53, Greg KH wrote:

quoted

On Fri, Feb 05, 2021 at 05:44:12PM +0800, Yicong Yang wrote:

quoted

From: Junhao He <redacted>

Use subdir-ccflags-* instead of ccflags-* to inherit the debug
settings from Kconfig when traversing subdirectories.

That says what you do, but not _why_ you are doing it.

i'll illustrate the reason and reword the commit.

quoted

What does this offer in benefit of the existing way?  What is it fixing?
Why do this "churn"?

currently we have added ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG in the Makefile
of driver/base and driver/base/power, but not in the subdirectory
driver/base/firmware_loader. we cannot turn the debug on for subdirectory
firmware_loader if we config DEBUG_DRIVER and there is no kconfig option
for the it.

Is that necessary?  Does that directory need it?

thanks,

greg k-h